<template>
  <div class="upload-preview-wrapper">
    <el-dialog
      title="图片上传"
      :visible.sync="viewDetails"
      width="800px"
      append-to-body
    >
      <el-upload
        multiple
        v-bind="$attrs"
        class="postingUpload"
        ref="upload"
        :action="uploadUrl"
        :before-upload="handleBeforeUpload"
        :on-success="handleUploadSuccess"
        :show-file-list="false"
        :headers="headers"
      >
      </el-upload>
      <div class="image-list-box">
        <ul class="file-list-container el-upload-list--picture-card">
          <vue-draggable
            v-model="uploadFileList"
            draggable=".img-item-odiv"
            class="draggable"
          >
            <transition-group>
              <li
                v-for="(file, index) in uploadFileList"
                :key="index"
                class="img-item-odiv el-upload-list__item"
              >
                <img class="el-upload-list__item-thumbnail" :src="file.url" />
                <span class="el-upload-list__item-actions">
                  <span
                    class="el-upload-list__item-delete"
                    @click="handleSingleRemove(file)"
                  >
                    <i class="el-icon-delete"></i>
                  </span>
                </span>
              </li>
            </transition-group>
          </vue-draggable>
        </ul>
        <!-- 上传按钮,点击时打开文件选择器 -->
        <div
          tabindex="0"
          class="upload-btn el-upload el-upload--picture-card"
          @click="clickUploadFile"
        >
          <i class="el-icon-plus"></i>
        </div>
      </div>
      <div slot="footer" class="dialog-footer">
        <el-button type="primary" @click="submitForm">确 定</el-button>
        <el-button @click="viewDetails = false">取 消</el-button>
      </div>
    </el-dialog>

    <div class="editor" ref="editor" :style="styles"></div>
  </div>
</template>

<script>
import VueDraggable from "vuedraggable";
import { getToken } from "@/utils/auth";
import Quill from "quill";
import "quill/dist/quill.core.css";
import "quill/dist/quill.snow.css";
import "quill/dist/quill.bubble.css";

export default {
  components: {
    VueDraggable,
  },
  props: {
    /* 编辑器的内容 */
    value: {
      type: String,
      default: "",
    },
    /* 高度 */
    height: {
      type: Number,
      default: null,
    },
    /* 最小高度 */
    minHeight: {
      type: Number,
      default: null,
    },
    /* 只读 */
    readOnly: {
      type: Boolean,
      default: false,
    },
    /* 上传文件大小限制(MB) */
    fileSize: {
      type: Number,
      default: 5,
    },
    /* 类型（base64格式、url格式） */
    type: {
      type: String,
      default: "url",
    },
  },
  data() {
    return {
      viewDetails: false,
      uploadFileList: [],
      uploadUrl: process.env.VUE_APP_BASE_API + "/common/upload", // 上传的图片服务器地址
      headers: {
        Authorization: "Bearer " + getToken(),
      },
      Quill: null,
      currentValue: "",
      options: {
        theme: "snow",
        bounds: document.body,
        debug: "warn",
        modules: {
          // 工具栏配置
          toolbar: [
            ["bold", "italic", "underline", "strike"], // 加粗 斜体 下划线 删除线
            ["blockquote", "code-block"], // 引用  代码块
            [{ list: "ordered" }, { list: "bullet" }], // 有序、无序列表
            [{ indent: "-1" }, { indent: "+1" }], // 缩进
            [{ size: ["small", false, "large", "huge"] }], // 字体大小
            [{ header: [1, 2, 3, 4, 5, 6, false] }], // 标题
            [{ color: [] }, { background: [] }], // 字体颜色、字体背景颜色
            [{ align: [] }], // 对齐方式
            ["clean"], // 清除文本格式
            ["link", "image", "video"], // 链接、图片、视频
          ],
        },
        placeholder: "请输入内容",
        readOnly: this.readOnly,
      },
    };
  },
  watch: {
    value: {
      handler(val) {
        if (val !== this.currentValue) {
          this.currentValue = val === null ? "" : val;
          if (this.Quill) {
            this.Quill.clipboard.dangerouslyPasteHTML(this.currentValue);
          }
        }
      },
      immediate: true,
    },
  },
  computed: {
    styles() {
      let style = {};
      if (this.minHeight) {
        style.minHeight = `${this.minHeight}px`;
      }
      if (this.height) {
        style.height = `${this.height}px`;
      }
      return style;
    },
  },
  mounted() {
    this.init();
  },
  beforeDestroy() {
    this.Quill = null;
  },
  methods: {
    submitForm() {
      let quill = this.Quill;
      // 确保光标聚焦到编辑器
      quill.focus();
      // 获取光标位置，如果未获取到则默认设置为编辑器内容的末尾
      let length = quill.getSelection()?.index || quill.getLength();
      // 插入图片
      this.uploadFileList.forEach((item) => {
        quill.insertEmbed(length, "image", item.url);
        length += 1;
      });
      this.viewDetails = false;
      this.uploadFileList = [];
    },
    init() {
      const editor = this.$refs.editor;
      this.Quill = new Quill(editor, this.options);

      // 如果设置了上传地址则自定义图片上传事件
      if (this.type == "url") {
        let toolbar = this.Quill.getModule("toolbar");
        toolbar.addHandler("image", (value) => {
          if (value) {
            this.uploadFileList = [];
            this.viewDetails = true;
          } else {
            this.quill.format("image", false);
          }
        });
      }
      this.Quill.clipboard.dangerouslyPasteHTML(this.currentValue);
      this.Quill.on("text-change", (delta, oldDelta, source) => {
        const html = this.$refs.editor.children[0].innerHTML;
        const text = this.Quill.getText();
        const quill = this.Quill;
        this.currentValue = html;
        this.$emit("input", html);
        this.$emit("on-change", { html, text, quill });
      });
      this.Quill.on("text-change", (delta, oldDelta, source) => {
        this.$emit("on-text-change", delta, oldDelta, source);
      });
      this.Quill.on("selection-change", (range, oldRange, source) => {
        this.$emit("on-selection-change", range, oldRange, source);
      });
      this.Quill.on("editor-change", (eventName, ...args) => {
        this.$emit("on-editor-change", eventName, ...args);
      });
    },
    // 上传前校检格式和大小
    handleBeforeUpload(file) {
      const type = ["image/jpeg", "image/jpg", "image/png", "image/svg"];
      const isJPG = type.includes(file.type);
      // 检验文件格式
      if (!isJPG) {
        this.$message.error(`图片格式错误!`);
        return false;
      }
      // 校检文件大小
      if (this.fileSize) {
        const isLt = file.size / 1024 / 1024 < this.fileSize;
        if (!isLt) {
          this.$message.error(`上传文件大小不能超过 ${this.fileSize} MB!`);
          return false;
        }
      }
      return true;
    },
    handleUploadSuccess(res, file) {
      // 如果上传成功
      if (res.code == 200) {
        this.uploadFileList.push({
          url: res.url,
        });
      } else {
        this.$message.error("图片插入失败");
      }
    },
    handleSingleRemove(file) {
      const index = this.uploadFileList.findIndex(
        (item) => item.url === file.url
      );
      if (index !== -1) {
        this.uploadFileList.splice(index, 1);
      }
      // this.$refs.upload.handleRemove(file);
    },

    handleRemove(file, fileList) {
      this.uploadFileList = [].concat(fileList);
    },

    //点击打开文件选择器
    clickUploadFile() {
      this.$refs.upload.$refs["upload-inner"].handleClick();
    },
  },
};
</script>

<style lang="scss">
.upload-preview-wrapper {
  .file-list-container {
    display: inline-flex;
    .img-item-odiv {
      max-width: 400px;
      overflow: hidden;
      position: relative;
    }
    img {
      width: auto;
      height: auto;
    }
  }
  .upload-btn {
    display: inline-block;
  }
  .image-list-box,
  .draggable > span {
    display: flex;
    flex-wrap: wrap;
  }
  .image-size {
    position: absolute;
    bottom: -20px;
    left: 0px;
    width: 100%;
    text-align: center;
    font-size: 12px;
    color: #606266;
    zoom: 0.9;
  }
  .warn-color {
    color: #606266;
    font-size: 12px;
    font-weight: 400;
    &.red {
      color: #f56c6c;
    }
  }
}
.editor,
.ql-toolbar {
  white-space: pre-wrap !important;
  line-height: normal !important;
}
.quill-img {
  display: none;
}
.ql-snow .ql-tooltip[data-mode="link"]::before {
  content: "请输入链接地址:";
}
.ql-snow .ql-tooltip.ql-editing a.ql-action::after {
  border-right: 0px;
  content: "保存";
  padding-right: 0px;
}
.ql-snow .ql-tooltip[data-mode="video"]::before {
  content: "请输入视频地址:";
}
.ql-snow .ql-picker.ql-size .ql-picker-label::before,
.ql-snow .ql-picker.ql-size .ql-picker-item::before {
  content: "14px";
}
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value="small"]::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value="small"]::before {
  content: "10px";
}
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value="large"]::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value="large"]::before {
  content: "18px";
}
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value="huge"]::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value="huge"]::before {
  content: "32px";
}
.ql-snow .ql-picker.ql-header .ql-picker-label::before,
.ql-snow .ql-picker.ql-header .ql-picker-item::before {
  content: "文本";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="1"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="1"]::before {
  content: "标题1";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="2"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="2"]::before {
  content: "标题2";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="3"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="3"]::before {
  content: "标题3";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="4"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="4"]::before {
  content: "标题4";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="5"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="5"]::before {
  content: "标题5";
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value="6"]::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value="6"]::before {
  content: "标题6";
}
.ql-snow .ql-picker.ql-font .ql-picker-label::before,
.ql-snow .ql-picker.ql-font .ql-picker-item::before {
  content: "标准字体";
}
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="serif"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="serif"]::before {
  content: "衬线字体";
}
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value="monospace"]::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value="monospace"]::before {
  content: "等宽字体";
}
</style>
